Solve the problem. Round your answer to two decimal places.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 105 seconds are required to make a 3-by-5 enlargement, find the time required for a 5-by-10 enlargement.
A. 450 sec
B. 400 sec
C. 300 sec
D. 350 sec
Answer: D
Mathematics
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Find the equation of the axis of symmetry of the parabola.y = -3x2 + 6x - 9
A. x = 6 B. x = 2 C. x = - 1 D. x = 1
Mathematics
Add or subtract measurement numbers, rounding to the correct precision.4 in. + 12 in.
A. 14 in. B. 20 in. C. 16 in. D. 18 in.
Mathematics
Match the equation to the graph.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.How many arrangements of answers are possible in a multiple-choice test with 7 questions, each of which has 4 possible answers?
A. 16,384 B. 210 C. 840 D. 35
Mathematics